“Zombie Alligators” (National Geographic Channel 7 p.m.) Given that this is actually a nature documentary from National Geographic, I don’t expect it to live up to the title. ... But damn, Sci-Fi Channel could learn a thing or two from these guys. Zombie Alligators!?! How could they have missed out on a title like that? It beats Ice Spiders by a country mile.

“Halloween Madness” (TLC 9 p.m.) The Learning Channel gets into the spirit of the season with this hour-long special about people and places that go overboard this time of year--from huge haunted houses to hyper-decorated households.

“Ghost Hunters Live” (Sci-Fi 7 p.m.) members of The Atlantic Paranormal Society spend their Halloween night broadcast live from the Waverly Hills Sanatorium in Louisville, Ky., for six hours straight. That’s six hours worth of people stumbling around in the dark and scaring each other silly with night vision goggles. Quote of the night: “What was that?” Expect to hear it a lot.